Please use OneTime 1.81 unless you want to help beta-test 2.0-beta15.
GNU/Linux, Unix, Mac:
OneTime 1.x is packaged in the Debian "testing" distribution as onetime.
As of June 2016, the version of OneTime packaged in Debian is somewhat behind the upstream release. We'll try to get Debian updated soon after OneTime 2.0 comes out.
For access to development source code, see the Development page.